Can you mix 5 20w and 5 30W oil?
Can you mix 5 20w and 5 30W oil? You can't mix between regular/synthetic blend/full synthetic but mixing weights, especially if they're by the same manufacturer, is no problem. What is the difference between 5 20w and 5 30W? This enables the 5w20 motor oil to reach engine parts quicker and create less drag that reduces fuel economy. So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during operating temperatures. Can you go from full synthetic to synthetic blend? Myth: Once you switch to synthetic oil, you can never switch back. This is...